Improvement in sewing-machines



o. MOORE, OE BUFFALO, NEW vonk.v

IIMPROVEMENT. IN SEWING-MACHINES.

Specication forming Ypart of Letters Patent No. 21,015, dated July 27,1858.

To all whom t may concern.:

Be it known that I7 GHARLEs MOORE, of

Buffalo, in the county of Erie and State of New York, have invented newand useful Improvements in Sewing-Machines; and I'do hereby declare thatthe following a is full and exact description thereof, reference beinghad to the accompanying drawings, and to the letters of reference markedthereon.

The nature of my invention relates, first, to an improvement in thefeeding mechanism; second, to an improvement in the looping mechanism.

Figure I is a perspective of a machine showing my improvements. Fig. IIis a perspective of the looping mechanism.

A.,`Fig.I, represents the bed-plate of the machine. A portion 4of thisplate is cut away in order to show more distinctly the construction andarrangement -of the feeding and looping mechanism.-

B represents the feed-plate. lThis is pivoted to the under side of thebed-plate, as represented at z. It extends along the bottom of thebed-plate, and has an offset or face which extends ,upward through theplate, as represented at B2. The cloth or material to be sewed rests oris supported upon this face B2. A small slit is made through this partof the feedplate, through which slit the needle passes when it puncturesthe cloth. This face performs the combined functions of pressing thecloth equally upon both sides of the seam or line of stitch in the actof feeding, and thus insures the movement of the cloth in a direct linewithout any tendency to twist or Wrinkle the cloth, and also supportsthe cloth equally upon all sides against the puncture of the needle.

c is a spring which is connected to the feedplate and bracing againstthe pin c2. This spring gives the feed-plate a lateral movement in theopposite direction to the cam I on the end of the driving-shaft.

D is a spring connected to the bed-plate, and, dropping down, passesunder the feedplate and driving-shaft, and through a'slot in the hangere. One object of this spring is to insure a yielding compressing of thefeed-plate upon the cloth, which will adapt itself to any thickness ofcloth.

eis ahanger connected to feed-plate (or feedbar) B; f, nib projectingfrom the spring D. g is a small cam on the driving-shaft, which strikesthe nib f at the proper time, and by means of the arrangement ofthespringD and hanger e the required downward movement is given to thefeed-bar.

. H is the driving-shaft.

I is a cam on the end of the driving-shaft.

J is a nib projecting downward from the feed-bar B. The cam I strikesagainst this nib and gives the requisite lateral movement to thefeed-bar tomove the cloth or material to be sewed the distance of onestitch forward; K, set-screws by which the length of the stitch isregulated; L L, hangers which are cast onto the bed-plate for thesupport of the drivingshaft; M, driving-pulley; N, needle-shaft.

O is a foot-piece. This is made adjustable on the shaft-head P, but isstationary and unyielding when the machine is in operation. A slot ismade in this foot-piece corresponding to the slot in the feed-bar, sothat the needle passes through the foot-piece, feed-bar, and cloth atthe Sametime; I), head or cylinder guide for needle-shaft; X,walking-beam;

Y, crank-shaft connected to driving-pulley vand walking-beam; t,tapering slit in hanger U, in which the loopingsprings work.

Q, Fig. II, is an expanding spring-looper. Two vsprings are made withpointswhich enn ter the loop, as represented in the drawings. They areplaced side by side, and made fast to thel sliding head B.

S S are guides which are cast on the under side of the bed-plate. Theseguides have a groove cut therein to receive pins which pro 'ject fromthe head R, and allow it to take a reciprocating right-line motion andan oscillating movement. The dotted lines show the looping-springs intheir highest position.

T is a connecting-rod. This has a rigid connection to the sliding headB, and works on a crank-pin, W, projecting from the cam I.

U is a hanger having a tapering slit for the purpose of bringing the twopoints of the looper together at the time they pass between the needleand thread. TheA springs work in this slit. When dropping down to thelower part of the slit, they close together, and when they rise theyexpand and spread the loop.

V is a spring, against which the points of the looper stri-ke as theypass between the neeing-rod having a rigid connection to the head R,.and the looping-springs also having a rigid connection thereto, it isevident that a lateral movement will be given to the head R and also .tothe looping-springs equal to the diameter of the circle described by thecrankpin. It is also evident that the points of the looping-springs willdescribe a circle. This movement will cause the springs to rise and.

fall in the tapering slit in the hanger U, and when dropping into thelower part of the slit they are brought together, so that their pointsWillfpass into the loop as one. As the springs rise, they graduallyexpand and take up all the slack in the loop. rIlhe springs are madesufliciently expansive to spread the loop to its limit, and yet sodelicate as to yield to the thread, Whatever may be the size of theloop. As the points of the looping-springs pass into the 1oop,theystrike against the spring V, and the spring V continues to press againstthe points until the needle has passed into the loop, and until thepoints recede past the needle, thus preventing the thread from slippingoff the points.

but

The operation of the feedingmechanism is deemed to be alreadysufficiently described.

I do not claim the feed-plate herein de'- scribed, nor the combinationthereof with either function it performs, when said functions areseparately considered. Neither do I claim any part of the mechanism, norany combination thereof, by which the feed-plate is operated, or bywhich either function there- I' of is produced, when separatelyconsidered;

1. The elastic compression feed plate B, when constructed with an offsetor face, B2, which projects through thebed-plate, and performs thecombined functions of supporting the cloth equally upon all sidesagainst the puncture of the needle, and ofV producing an equal pressureupon the cloth upon both sides of the seam or line of stitch when in theact of feeding, substantially as herein described.

-2. The selfexpanding looping-springs Q, arranged and operating asdescribed, in combination with theslotted hanger U and spring V, for thepurposes substantially as herein set forth.

y CHARLES MOORE.

Witnesses: W. D. DELEVAN, W. H. FURiUsH.

